Duplicating apparatus.



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No. 884,704.. I PATENTED APR. 14, 1908. E. J. BRASSEUR. DUPLIGATINGAPPARATUS.

APPLICATION FILED JULY 25. 1907.

2 SHEETS-SHEET 2.

INVENTOR WITNESSES i' ATTORNEY E -l which are to be reproduced cuttherein.

Uurr'n sTrns PATENT OFFICE ERNEST J. BRASSEUR, OF CHICAGO, ILLINOIS,ASSIGNOR TO A.. B. DICK COMPAY, CHICGO, ILLINOIS, A CORPORATION OFILLINOIS.

D'PLICA'IING APPARATUS.

Specification of Letters Patent.

Patented April 14, 190s.

.application filed July 25, 1907. Genial No. 385,433.

'paratu's comprising a printing couple, the

members of which are movable relatively to effect the printingof theimpression and one of which members is movable toward and away from theother to operative and inoperative' positions.

The invention has reference more particularly to duplicating apparatusprinting by means of a stencil having the characters In such machines,there are employed a drum having the stencil secured thereon andcovering a portion of the periphery, and a pressure-roller adjacent tothe drum and 1novable toward and away from the same ,to operative andinoperative positions as the drum is rotated. The impressioneheet isfedover' a suitablefeed-board or guides, so that, when thepressure-roller is raised to operative 'position, its forward edge willbe grasped between the drum and roller and the sheet fed forward andsimultaneo .i imprinted upon.

vIn stencil-duplicating machines employing such a drum andpressure-roller, it is unda sirahle to ,have4 the pressure-roller raisedto operative position 'einen no impression-sheet is fed forward tocoperat-e therewith, for if nov sheet were fed forward andt'heimpressionroller were raised, the latter would malte contact withthe stencil on the drum and take up ink therefrom, and when next ahimpressionsheet were fed 'thrcug r the fune, this inlr would betransferred to the b :of the sheet. In accordance with ir inventionyiiprovide mechanism preventing such movements of the pressure-roller intocoperative relation to the drum when no sheet is fed forward thereto.This mechanism coacts with the impression-sheet itself, and itsoperation is controlled thereby in such manner that if no sheet ispresent in a position for printing the pressure-roller will not beraised to its opera- .extensions e (Fig. 1).

vthe shaft f2 and the other to one of the s broken away in part; Fig. 2is a top view, the

stencil-carrying drum 'being removed; and Fig. 3 is a detail viewcorresponding to Fig. 1v but showing a diferentvposltion of 'theoperating arts.

Re erring to these drawings, the machine consists of a base A on whichare mounted side-frames B, B', and a stencil-carrying drum C mounted forrotation in suitable bearinffs formed in the frames B, B. The drum isofthe usual construction, having a sheet of foraminated material over aportion of its periphery and means for securing the ends of astencil-sheet to the drum se thatit overlies this foraminated sheet. Theshaft c of the drum carries a gear-wheel c meshing with a gear c2carried by a stub-shaft mounted for rotation in a bearing formed in theframe-plate B, which shaft also carries an operating handle c3. Directlyunderlying the drum C is the pressure-roller D carried by arms E, E',which are loosely mounted at one end upon a shaft e journaled insuitable bearings in the side-frames. At their free ends, the arms E, Eare provided with curved A shaft e2 is mounted in bearings in theside-frames and has cams e3 secured thereon in position to coact withthe extensions e, so that when theshaft e2 is turned by means of 'ansuitable handle the cams e3 will coactv with thejext'ensions e to turnthe arms E, E upon the shaft e and thus lock the pressure-roller D inits inoperative positicn. d'.

Mounted upon and extending between the side-frames B, B', is afeed-board F havinga plurality of openings f therein. Suitable standardsf mounted at the sides of the feedboard F have bearings formed thereinto receive the ends of the shaft f2 which carries a fingers beingadapted to enter one of the 4opei'iings f in the feed-board F. Securedtoprovided with an elongated slot g3 through which'the shaft c of thedrumC extends(v Lever G carries a roller gtivhich bears on the periphery ofa cam g5 securedto the shaft c.- A coil-spring g6 (Fig. 2) hasonendiixed toards f and tends to turn shaft f3 so as to carry theends'of the fingers f3 into openings f and to hold the-roller g4 againstthe periphplurality of fingersff, the end of each of theseI ery of thecam The cam ghas a single raised portion g7 thereon, and the half ofthe` cam op aosite this raised portion is a true semicirc e. ,Secured onthe shaft c of the drum C adjacent to. the cam g5, is a second cam 72,the peri hery of which is adapted to coact with a ro ler /i carried by'alever H.

Cam h has a single raised portion, which lies directly opposite theraisedportion g7 on the cam g5. This lever is also provided with a sloth2, through which the shaft c extends. Intermediate its ends, .the leverH rests upon the'pin g carried by `the arm' g, and at the end oppositethat carrying the roller it lever -'H is provided with a tooth h3.Loosely mounted on one of the tie-rods h4 connecting the side-frames ofthev machine, adjacent to one end thereof, is a lever K carrying at itsupper end a milled pin 7c adapted to coact` with the tooth h3 on thelever H. At its lower end, lever K carries a pin Zr which ea'.-

. direction ofthe arrow in 1, and also, b'y

means of mechanism not herein shown as it vfprms no part of my presentinvention, movin the arms E, to carry the pressurero er D to operativeand inoperative positions. Once m each revolution of the drum C, theraised portion g of the cam g5 actuates the leverAG to'rock the shattf2and thus raise ,the ends of the iingersj"3 out of the openings f andthen lower them yagain into those openings. As shaft f2 is thus rocked,pin g raises 'the free end` of lever H and then lowers the same again.if an impression-sheet be fed over the feed-board F while the ends ofthe fingers f3 are raised above the surface of the feed-board to carrythe edge of the' impression-sheet into )osition to be grasped lbetweenthe drum and roller D when the latter is raised, then when the roller g4passes be- A yond the raised portion a7 the ends of the iingersj'3 willnot movedownward to the position in which they 'are' shown in Fig. 1,since they will be arrested by the impressionsheet in theposition inwhich they are shown in -Fig. .3, thev impression-sheet being hereindicated -by the lette. When the arts are in thiswpositithe pin-g holdsthe ever H insuch position that the tooth h3 is above the upper edge ofthe milled pin k. As the rotation of the drum C, continues, the cam hcoacts with the roller 71, to move the lever H to the rightin Figs. 1and 3, and on account of the elevated position in which the free end oflever H is held, the tooth h3 will move past the pin 7c without'engagingthe latter'. During the further rotation of the drum, theimpression-sheet will be grasped between it and the roller D and fedforward and-imprinted upon in the usual manner. if no impression-sheetbe fed over the board F, the ends of the ngers f3 will not be arrestedin their downward movement, but will be carried to the positionin whichthey are shown in Fig, 1, thus allowing the free end of lever H to movedownward to the position' in which it is shown in that figure. In thatcase, asthe cam h moves the lever H to the right in Fig. 1, the toothwill engage the pin c and rock the lever K on its pivoth, the pin 7c onlever Kwill engave the end of lever J, and the shaft e; towhidh thelever J is fixed, will be rocked in itsbearings. The pins j, 7" carriedby the lever J and arm J will,

during this rocking movement of the shaft e, turn. the arms E, E aboutthe shaft e, so as to carry the pressure-roller D downwardly toinoperative position, and the roller will be held in this position untilthe lever H moves i to the left again, after the roller h has passedover the raised portion on the cam h. It will thus be seen that when animpression-sheet is-properly fed into the machine ,the operation ofimprinting upon the sheet is performed in the usual manner, but ifnosheet y'be fed, the pressure-roller D` is held in the depressed or.inoperative position while the stencil ispassing over the roller, sothat the roller will not take-up ink from the sheet, which, in thefurther operation of the machine, wou`ld be transferred to the backs ofimpression-sheets subsequently fed into the machine. 4, v

Having now described my invention, what I claim as new therein anddesire to secure by Letters Patent is as follows 1. In a. duplicatingmachine,y the combination of a drum, meansfor securing astencilsheetthereon, Vmeans for rotating the drum, a

pressure-roller, movable arms in which said roller is rotatably mounted,said arms being movable in correspondence with the rotation of the drumto carry the pressure-roller to operative and inoperative positionsrelatively to the drum a feed-board over which impression-sheetsgare fedbetween the drum and roller, and means controlled by an impression-sheeton said feed-board for operating` said arms to position'thepressure-roller, substantially as set forth.

2. In a duplicating machine, the combination of a drum, means forsecuring a stencilsheet thereon, means for rotating the drum, apressure-roller underlying the drum, pivoted arms in which said rolleris rotatably mounted, said arms being movable about their pivots tocarry the roller toward and away Jfrom4 the drum, a feed-board overwhich impression-sheets are fed between. the

drum and roller, and means controlled by 13o 'tion\the forth. l

4. In a duplicating machine, the combination of a drum, means forsecuring a stencilssamm mounted, said arms being movable about. theirpivots to carry the roller toward and awayf'rom the drum, a feed-boardover which impression-sheets are fed between the drum and roller, an armmovable to coact with an impression-sheet and ada ted to have itsmovement arrested there y, and means controlled by the' arresting of.the movement of said arm by the impressionsheetfor operating saidpivoted armsL to posipressure-roller, substantially as set sheetthereon, means for rotating the drum,

a pressure roller,l arms in which said roller `is rotatably mounted,said arms being movable tocarrysthe roller to operative and inoperativepositionsrelatively to the drum, means for guiding an impression-sheetlbetween vthe drum and roller, an arm movable to coact with animpression-sheet when in position for coactionwith. the drum and roller;andadaptedto have its movement arrested theehygand means controlled bythe coaction ofsja rm wit-haan impressionsheet forpositiening,thepressuiie-roller relatively'to the drumfsubstantayiassetforth.

- 5; In a duplicating machine, the combination of a'drum, meansforsecuring a stencil- .v sheet thereon, means for rotating the drum,

l isrotatably mounted, said arms being mova-.pressure-roller, arms inwhich said roller 'able to carry the roller to operative 'andinoperative ositions relatively to the drum, a feed-boar over whichimpression-'sheets are fed between said drum and roller, said boardhaving an opening therein, an arm mounted adjacent tothe feed-board andadapted'to be moved asthe drum is rotated to carry its end intosaidopeningorlinto coaction with an 50 impression-sheet, and meansoperated when said arm entersfsaid Vopening for holding thepressure-rollerin inoperative position, substantially as setforth;l

G. In a duplicating machine, Athe combination of a drum, means forsecuring a stencilsheet thereon, means for rotating the drum, apressure-roller underlying the drum, pivoted arms in which the roller isrotatably mounted,a feed-board over which impression-sheets are fedbetween the drum and roller, connections between the drum and said armsfor operating the latten as the drum is rotated to move thepressure-roller toward and away from the drum, and-means controlled byan impression-sheet on said feed-board` for making and breaking saidconnections, substantially 4as set forth.

7 In a duplicating machine. the combination of a drum, a,v stencil-sheetsecured thereon, umeans for rotating the drum, a

pressure-roller, arms in which the roller is. v

rotatably mounted movable to carry the roller to operative andinoperative positions vrelatively to the drum, means for guidingimpression sheets between the drum and roller,v connections between thedrum and said arms for .operating the latter as the drum is rotated tomove the roller relatively to the drum, and means controlled by animpression-'sheet in position for coaction with the drum and roller formaking and breaking said connection, substantiallyv as set forth.

S. In aduplicating machine,A the combina,- tion of a drum, a stencil-sheet secured thereon, means for rotating the drum, a pressure-roller,arms in which the roller is rotatably mounted movable to carry theroller to operative and inoperative positions relatively to the drum, afeed-board `over which impression sheets are fed between the said drumand roller, said board having an opening therein, a controlling armmounted adjacent to the feed-board and adapted to be moved as the drumis rotated to carry its end inte said opening or into coaction with animpression-sheet, connections between the-drum and the arms carrying thepressureroller for operating the latter as the drum is rotated to movethe roller relatively to the drum, and means operated when saidcontrolling Varm enters said opening for making and breaking saidconnections, substantially as set` forth.

This lspecification signed and witnessed'

